Chemistry: fertilizers – Processes and products – Forms or conditioning
Patent
1983-01-03
1989-05-30
Mills, Catherine L.
Chemistry: fertilizers
Processes and products
Forms or conditioning
71 78, A01U 5700
Patent
active
048347884
ABSTRACT:
Plant seeds are beneficiated by contacting them with an aqueous solution of a urea-sulfuric acid component containing the monourea adduct of sulfuric acid. The molar ratio of urea to sulfuric acid in the aqueous solution is preferably within the range of about 1/4 to about 7/4 so that at least about 25 percent of the sulfuric acid is present in the solution as the monourea adduct. The treatment of plant seeds with the aqueous urea-sulfuric acid components is particularly useful for removing residual plant matter from plant seeds, scarifying and improving the germination of plant seeds, and improving the processability and digestibility of plant seeds. Improvements in processability result from softened seed hulls or husks, improved extractability of oil from oil-containing seeds, and improved quality of treated seeds for the manufacture of seed-derived products, particularly for the manufacture of grain-derived products. Compositions which involve mixtures of plant seeds and the urea-sulfuric acid components are also provided.
REFERENCES:
patent: 1340708 (1920-05-01), Fjellanger
patent: 4116664 (1978-09-01), Jones
patent: 4214888 (1980-07-01), Young
patent: 4318343 (1982-01-01), Verdegaal et al.
Clark, Chem. Abst., vol. 94 (1981) 29037w.
D. F. du Toit, Verslag Akad. Wetenschappen, 22, 573-4 (abstracted in Chemical Abstracts, 8, 2346, 1914).
L. H. Dalman, "Ternary Systems of Urea and Acids; I. Urea, Nitric Acid and Water; II. Urea, Sulfuric Acid and Water; III. Urea, Oxalic Acid and Water"; JACS, 56, 549-53 (1934).
Sulfur Institute Bulletin No. 10 (1964) "Adding Plant Nutrient Sulfur to Fertilizers".
Laird Michael H.
Mills Catherine L.
Union Oil Company of California
Wirzbicki G.
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